Door jamb



FIG. 1 is a front top perspective view of a door jamb showing my new design;

FIG. 2 is a rear bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a first side view thereof;

FIG. 6 is a second side view thereof;

FIG. 7 is a front elevation view thereof; and,

FIG. 8 is a rear elevation view thereof.

The broken lines shown in FIGS. 1 through 8 illustrate portions of the door jamb that form no part of the claimed design. 

CLAIM The ornamental design for a door jamb, as shown and described. 